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Old 07-06-2012, 01:09 PM   #1
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High nitrates

Have a 29 gallon reef tank that I started about 4 months ago. My nitrates are very high. Been changing water weekly. Cleaned filter and I still have high nitrates. Any suggestions how to get them down? Already lost some corals. And how often can I change the water?

Have a 6 stage RO/DI system.
30 lb live rock
30 lb live sand
Fluval 305 canister filter
2 powerheads
Coralife protein skimmer. Good up to 100 gallons.
2 ocellated clownfish
1 six line wrasse
2 blue/green chromis
1 pajama cardinal
1 black and gold damsel
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Old 07-06-2012, 01:18 PM   #2
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Quote:
Originally Posted by dlsrks View Post
Have a 29 gallon reef tank that I started about 4 months ago. My nitrates are very high. Been changing water weekly. Cleaned filter and I still have high nitrates. Any suggestions how to get them down? Already lost some corals. And how often can I change the water?

Have a 6 stage RO/DI system.
30 lb live rock
30 lb live sand
Fluval 305 canister filter
2 powerheads
Coralife protein skimmer. Good up to 100 gallons.
2 ocellated clownfish
1 six line wrasse
2 blue/green chromis
1 pajama cardinal
1 black and gold damsel
I can't see anything your doing wrong. how high are your nitrates
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Old 07-06-2012, 01:39 PM   #3
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How much are you feeding and how often do you feed?
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Old 07-06-2012, 05:14 PM   #4
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It's good that you have a decent skimmer, that's helping, and you could be overfeeding, contributing to the issue, but I believe the root of your problem is the fact that you have 7 fish in a 29 gallon reef.... that's quite a bioload. On top of that, you're using a canister filter. Doesn't really matter how much you clean it... it's still converting 7 fish's worth of waste into nitrates.

Sounds like you have 2 options... get rid of the canister and a few fish, or be prepared to do larger pwc's more often to prevent further coral loss.
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Old 07-06-2012, 05:33 PM   #5
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I had 5 fish in my first sw tank which was a 29g. I also started it with just a hang on back filter and eventually going to a canister. I consistently held at 0 nitrates. It can be done.

My question would be also how much and how often are you feeding? And for ha'ha's have you ever tested the ro/di water for nitrates? You never know....
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Old 07-06-2012, 05:40 PM   #6
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This is 7 fish in 29g. You are overstocked my friend. No other way to fix this besides removing atleast 2-3 fish. Remember these fish grow the more they grow the bigger the bioload.

Im maxed out at 4 fish in my 29g reef. If i added one more fish, i would have a major problem.
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Old 07-06-2012, 05:41 PM   #7
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Thats a lot of fish in 4 months, i am not sure if the biological filter has had enough time to get established that quick. I feel like i am pushing my bioload with 7 in a 55g with a oversized skimmer. When i had high nitrates a did 40% water changes every 3rd day till they were down
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Old 07-06-2012, 07:07 PM   #8
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Nitrates are around 80. I feed them every two days. I moved the rest of my corals to my 75 gallon reef tank. So I won't be feeding much now that it's fish only. I was feeding quarter cube of brine shrimp and coral food. I do have some new growth on the live rock but they are very small and don't seem to be effected.
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Old 07-06-2012, 07:16 PM   #9
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Based on what fish I have in the 29 gallon, which fish do you think I should move to my 75 gallon? I know I can't move the clownfish. I did have a domino damsel in there that I moved. He was a little terror in there.
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Old 07-06-2012, 08:10 PM   #10
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If you need to move , the chromis can be moved without worry , there super nice fish.
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